2002 Subaru B4 Legacy Issue

[4G63B8]

Hi Guys, the bro in law has an auto twin turbo legacy and is having this issue and I have no idea what could be causing it, when he starts the car its all fine but as soon as he goes into drive and press the accelrator the car revs but doesnt move and than suddenly it will move and than it will start to work fine, reverse works fine and if you just have it in D without pressing the accelrator car moves normal, also when he accelrates you hear this weird sound from the front right like a air suction or something like soft metal grinding but in idle and rev nothing... put on a diagnostic and came up with no error codes.... any ideas??

[Rosssub]

Must be a Solenoid Fault inside the Box. Has it every had the Filter changed? How\'s the Fluid Levels?

Check this PDF out regarding Sensor/Solenoid Failure and Trans Diagnostics:

http://www.google.co.nz/url?sa=t&rct=j&q=&esrc=s&source=web&cd=7&ved=0CFMQFjAG&url=http%3A%2F%2Fwww.subaruforester.org%2Fvbulletin%2Fattachments%2Ff89%2F21054d1262723964-dtc-pressure-control-solenoid-p0748a.pdf&ei=DGAyU8ifMM2XkwWVrIGwDg&usg=AFQjCNFlUrnfgOjgHvatc2Lfn_UIvdulrg&sig2=uu1upiV_u-86T6QA42sWdA

[Jesus]

D-drops and a banana peel in the oil. Works errytime....except when it doesnt.

But seriously, put some fluid in it and do a skid.

[94 Leone]

Time for a trans flush probably.

[4G63B8]

yup had it serviced with oil change, but gearbox oil probably hasn\'t lately will check the stuff mentioned and see if that could be causing it, thanks guys will post once tested